And the reason they don't have more market share is because Chrome is still faster and provides a better experience on average than Firefox does. I switched (back) to Firefox a few years ago, and I'm mostly happy with it. But when I try to get others to switch, those that end up not switching try for a few days and run into horrible performance issues that cripple their browsing experience. Clearly this isn't a universal issue (my experience is fine), but it's a big enough issue that it likely hampers further adoption.

I pretty much never hear "Firefox doesn't work properly on X site" as a reason they can't use Firefox. In the end, people use Chrome because it tends to give a better experience for people, even given its lack of respect for their privacy.